JPH0349437Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Technical Field of the Invention The present invention relates to a mounting mechanism for a printed circuit board that is mounted close to and parallel to a bottom plate in an electronic device housing.

(b) Background of the technology In recent years, it has become common for electronic devices to use printed circuit boards due to the miniaturization and high-density packaging of electronic components used in electronic devices. Therefore, there are cases where a printed board is further arranged on top of the printed board, and the basic printed board in this case is commonly called a motherboard. The present invention relates to a printed board mounting mechanism for mounting a printed board such as a motherboard in close proximity to and parallel to the bottom plate of a housing.

(c) Prior art and problems A perspective view of a printed board mounting mechanism for a metal casing for electronic equipment according to the prior art is shown in FIG. 1, and a sectional view taken along arrows A and B in FIG. 1 is shown in FIG. .

In Fig. 1, 1 indicates a metal housing 2 for electronic equipment, and the housing 1 includes a bottom plate 1-1, a back plate 1-2, and a side plate 1-.
Top plate 1-3 and front panel 1-5 integrated with 4
Consists of. A printed board 2 is attached to the bottom plate 1-1 with four screws 3.

In FIG. 2, the bottom plate 1-1 is provided with four protrusions 1-6 that protrude into the housing, a through hole for screws is provided in the center of the protrusions 1-6, and a washer 4 and a spacer 5 are provided.
The printed board 2 is fixed to the bottom plate 1-1 via screws 3 and nuts 6 on the back side of the protrusion 1-6.

According to the above-mentioned conventional technology, since the printed board has a large number of parts to be assembled, a large number of assembly steps are required, and the removal and replacement of the printed board for maintenance and inspection also requires a large number of steps and is complicated.

Another problem is that the use of small assembly parts within the housing is undesirable as the assembly parts may unscrew during assembly or equipment operation and may roll within the housing and damage the small electronic equipment. It was hot.

(d) Purpose of the invention The present invention provides a mechanism for fitting the printed board into the housing when mounting the printed board close to and parallel to the bottom plate inside the housing of an electronic device, making it easy to mount the printed board without using screws. It is intended to be removable and stable to wear.

(e) Structure of the invention The above purpose is to provide a metal housing for electronic devices with a protruding part on the back plate which is a wall plate perpendicular to the bottom plate of the electronic device, and the protruding part is press-formed from the outside to the inside. It has a trapezoidal shape, and has a fitting groove on the top and side surfaces that corresponds to the thickness of the printed board parallel to the bottom plate at the position of the holding height of the printed board, and a fitting fitting is provided on the bottom plate, and the fitting is attached to a spring. The lower end is fixed to the bottom plate, and the lower end of the printed board is placed at a position corresponding to the holding height of the printed board, and the stepped part elastically holds the side surface of the end in a direction parallel to the printed board surface. This is achieved by a printed board mounting mechanism characterized in that one end of the printed board is inserted into the fitting groove of the protrusion, and the other end is elastically held by a stepped part of the fitting. Ru.

(f) Embodiment of the invention An embodiment of the printed board mounting mechanism according to the invention is shown in FIGS. 3a, 3b, and 4. In FIGS. 3 and 4, the same reference numerals as in FIGS. 1 and 2 indicate the same objects.

FIG. 3a shows a perspective view of an embodiment of the present invention, and FIG. 3b shows an enlarged perspective view of the fitting groove. FIG. 4 shows a sectional view taken along arrows C and D in FIG. 3a.

In Figures 3 and 4, 7 is the bottom plate 1 of the housing 1.
It is a trapezoidal protrusion that is press-molded on the printed board side of the back plate 1-2, which is a wall plate substantially perpendicular to the wall plate 1-1, that is, in FIGS. Reference numeral 8 in b is a fitting groove formed by cutting on the top and side surfaces of the protrusion 7, the height of this groove is selected to be the holding position of the printed board, and the width of the groove is approximately equal to the thickness of the printed board. There is. 9 is the bottom plate 1
-1 is a fitting made of spring material that is fitted by pressing the other end of the printed board 2 placed upright from above as shown by arrow E in Figure 4.As shown in the figure, the lower end is fixed to the bottom plate and the printed board is It has a stepped portion for placing the lower surface of the end of the printed board at a position corresponding to the holding height and elastically holding the side surface of the end in a direction parallel to the surface of the printed board. 10 is a spacer for reinforcing the printed board when the printed board 2 is pressed from above as shown in FIG. 4F.

According to this embodiment, the printed board 2 is the top plate 1 of the housing.
The printed board 2 is mounted on the housing 1 by removing the printed board 2 from above and removing the printed board 2 from above, inserting one end of the printed board 2 into the groove 8, and fitting the other end into the fitting 9 by pressing the printed board 2 from above. After mounting, the printed board 2 is secured in the fitting groove 8 by the biasing force of the spring of the fitting fitting 9.

If the part of the printed board 2 fitted into the fitting 9 is lifted upward against the biasing force of the spring of the fitting, the printed board is separated from the fitting and can be taken out from the fitting groove 8.

(g) Effects of the invention According to the invention, a printed board that is mounted close to and parallel to the bottom plate of an electronic device housing can be easily mounted by simply fitting it in without using fastening parts such as screws, and it can also be removed easily. This can be done easily by removing the printed board from the fitting mechanism, and it is securely held by the fitting mechanism during mounting, which is effective in reducing equipment costs by reducing the number of assembled parts and assembly man-hours.
Maintenance and inspection of printed circuit boards can be easily performed, and small assembly parts such as screws do not fall out of the housing, which has a great effect on improving the reliability of electronic equipment.

[Brief explanation of drawings]

Fig. 1 shows a perspective view of a printed board mounting mechanism according to the prior art, Fig. 2 shows a sectional view taken along arrows A and B in Fig. 1, and Fig. 3a shows an embodiment of the printed board mounting mechanism according to the present invention. Fig. 3b shows an enlarged perspective view of the fitting groove, which is a part of the mechanism according to the present invention, and Fig. 4 shows arrows C and D in Fig. 3a.
1 shows a cross-sectional view of a printed board mounting mechanism according to the present invention. The same symbols throughout the figures indicate the same objects.1
is a metal housing for electronic equipment, 1-1 is a quadrilateral bottom plate of housing 1, 2 is a quadrilateral printed board, 1-2 is a back plate that is a wall plate that is almost perpendicular to the bottom plate 1-1, and 8 is an inset. The groove 9 is a fitting.

Claims (1)

[Scope of utility model registration request] The back plate, which is a wall plate perpendicular to the bottom plate of the metal case for electronic equipment, is provided with a protrusion, and the protrusion has a trapezoidal shape that is pressed from the outside to the inside, and the top and side surfaces are used to hold printed boards. It has an inset groove that corresponds to the thickness of the printed board parallel to the bottom plate at the height position,
On the other hand, the bottom plate is provided with a fitting fitting, which is made of a spring material and whose lower end is fixed to the bottom plate. One end of the printed board is inserted into the fitting groove of the protruding part, and the other end is elastically held by the stepped part of the fitting. A printed board mounting mechanism characterized by: